(19)

(11)

EP 2 614 214 A2

(12)

(88) Date of publication A3: 21.06.2012 (43) Date of publication: 17.07.2013 Bulletin 2013/29 (21) Application number: 11831650.4 (22) Date of filing: 07.10.2011

(51) International Patent Classification (IPC):  E21B 19/22(2006.01) E21B 23/00(2006.01) E21B 19/08(2006.01) (86) International application number: PCT/US2011/055199 (87) International publication number: WO 2012/048180 (12.04.2012 Gazette 2012/15)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 07.10.2010 US 900050 (71) Applicants: Schlumberger Technology Corporation Sugar Land, TX 77478 (US) IS  Services Pétroliers Schlumberger 75007 Paris (FR) FR  Schlumberger Holdings Limited Tortola (VG) GB NL  Schlumberger Technology B.V. 2514 JG The Hague (NL) AL BG CZ DE DK GR HU IE IT LT NO PL RO SI SK TR  PRAD Research and Development Limited Road Town, Tortola 1110 (VG) AL AT BE CH CY EE ES FI HR IS LI LU LV MC MK MT PT RS SE SM

(72) Inventor: SHAMPINE, Rod Houston Texas 77008 (US) (74) Representative: Fortt, Simon Merton et al Schlumberger Cambridge Research Ltd IPL High Cross, Madingley Road Cambridge, Cambridgeshire CB3 0EL Cambridge, Cambridgeshire CB3 0EL (GB)